Add test for multithreaded ActiveVerifier behavior.

base/win/scoped_handle.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_WIN_SCOPED_HANDLE_H_
 #define BASE_WIN_SCOPED_HANDLE_H_
 
 #include <windows.h>
 
 #include "base/base_export.h"
@@ skipping 153 matching lines @@
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(VerifierTraits);
 };
 
 typedef GenericScopedHandle<HandleTraits, VerifierTraits> ScopedHandle;
 
 // This function may be called by the embedder to disable the use of
 // VerifierTraits at runtime. It has no effect if DummyVerifierTraits is used
 // for ScopedHandle.
-void BASE_EXPORT DisableHandleVerifier();
+BASE_EXPORT void DisableHandleVerifier();
 
 // This should be called whenever the OS is closing a handle, if extended
 // verification of improper handle closing is desired. If |handle| is being
 // tracked by the handle verifier and ScopedHandle is not the one closing it,
 // a CHECK is generated.
-void BASE_EXPORT OnHandleBeingClosed(HANDLE handle);
+BASE_EXPORT void OnHandleBeingClosed(HANDLE handle);
+
+// This testing function returns the module that the ActiveVerifier concrete
+// implementation was instantiated in.
+BASE_EXPORT HMODULE GetHandleVerifierModuleForTesting();
 
 }  // namespace win
 }  // namespace base
 
 #endif  // BASE_WIN_SCOPED_HANDLE_H_